Case Studies Garmin Install: GMA342, GNC255A AND GTX335 IN! Garmin Install: GMA342, GNC255A AND GTX335 IN! Installed in a PA28. Removed: Bendix King KMA20 audio panel, Bendix King KX175B Radio and a Bendix King KT76A. Installed: Garmin GMA342 Audio Panel, Garmin GNC255A Nav/Comm and Garmin GTX335 Transponder Related